The is a member of the Series CMOS range, and contains four independent NAND gates, each with two inputs. The pinout diagram, given on the. NAND Gate, CD, 2 Input, mA, 3 V to 18 V, DIP with direct implementation of the NAND function and supplement the existing family of CMOS gates. Texas Instruments CDBE CD – CMOS Quad 2-Input NAND Gate (Pack of 5): : Industrial & Scientific.

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I still notice the output in the simulator is same. Aug 5, 17 2. Aug 6, 4.

NAND Gate Oscillator using CD4011

Why do you use a very high value resistor 1M feeding the oscillator to the counter’s clock input? Hi Audioguru, I changed the circuit nans per your suggestion. Apr 20, 15, I got rid of the switch that shorts the output to ground, was using it as a reset.

Would appreciate any feedback from you? Quote of the day.

The datasheets of Cmos gates shows that they switch their output in only 50ns 0. The 1M resistor between the oscillator and counter is not required and might stop the circuit from working because it will combine with stray capacitance between wires and cause the square-wave from the oscillator to be a triangle-wave at the clock input of the counter.


Dec 20, 10, 1, Aug 5, 1. Your simulation software is wrong because it shows the input going 4V higher than the positive supply and 4V below ground. Yes, my password is: Maybe it will be simpler to use Aug 6, 6.

Aug 6, I have created the following image attached NAND gate oscillator using 2 gates. May 11, If only one input is used and the spare input is connected to the positive supply voltage then the output will be more symmetrical.

You get oscillator and counter in one. Aug 6, 5. Your oscillator has both inputs of the gates shorted together.

Quad 2-in NAND Gate CMOS IC | Jaycar Electronics

What is wrong in this circuit? Hi beenthere, I have made a new circuit.

Your SIM program doesn’t know that the input of Cmos gates have input protection diodes that limit the input voltage to plus and minus 0. Your name or email address: Aug 6, 8. Your Yenka sim software doesn’t know if it is coming or going. Aug 7, The absolute max supply for a high speed 74HC is 7V and they recommed a max of 6V.


You might get better results with a different arrangement of the RC components – http: NAND gate oscillator frequency calculation Posted by ukiceman in forum: The circuit supply voltage is 12v. Aug 5, 2. Aug 6, 7. The wave is not exactly square in shape.


Feb 17, 4, 1, You May Also Like: Do you already have an account? I don’t know why your oscillator has a switch at its output that shorts the output to ground. Aug 6, 9. The diodes at the input protection of Cmos gates clamps the input voltage to 0.

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